Sox win 4-2, World Series tied 2-2.

Red Sox left fielder Jonny Gomes hits a three-run home run against the St. Louis Cardinals in the sixth inning during game four of the MLB baseball World Series at Busch Stadium. (H.Darr Beiser-USA TODAY Sports)

He wasn't even supposed to start, but Jonny Gomes delivered for the Boston Red Sox.Gomes, replacing Shane Victorino, who was a late scratch with back stiffness, hit a three-run homer in the sixth inning to give the Sox a 4-2 win over the St. Louis Cardinals in Game 4 of the World Series on Sunday. the series is even at two games apiece with Jon Lester pitching tonight for Boston against the Cards' Adam Wainwright in Game 5.Boston's sixth-inning rally began with two out. Dustin Pedroia singled to center and David Ortiz walked. St. Louis replaced starter Lance Lynn with Seth Maness to face Gomes. Gomes deposited a two-ball, two-strike sinker into the bullpen in left field to give Boston a 4-1 lead.St. Louis got one back in the bottom of the seventh when pinch-hitter Shane Robinson singled off Felix Doubront and took second when Gomes bobbled the ball. Boston manager John Farrell summoned Craig Breslow, who gave up an RBI single to Matt Carpenter. After a walk to Carlos Beltran, Boston brough in Junichi Tazawa, who ended the inning by retiring Matt Holliday on a groundout to second.St. Louis opened the scoring in the third. Carpenter singled to center and advanced to second on Jacoby Ellsbury's bobble. Beltran scored him with a single to right center.The Red Sox got a run in the fifth. Ortiz opened with a double to the gap in right-center. Gomes and Xander Bogaerts walked to load the bases and Stephen Drew scored Ortiz with a sacrifice fly to left, the sliding Ortiz just beating the throw from left, which hit him in the back.Sox starter Clay Buchholz, whose status was uncertain, pitched four solid innings for Boston. Despite not having anything close to his best fastball, he located well and changed speeds and allowed only three hits and one unearned run. He struck out three and walked two.Lynn went 5 2/3 innings for St. Louis. He was charged with three runs, all earned, on three hits. He walked three and struck out five.